Online Condition Monitoring
● Early indication of oil changes
● Load optimization
● Damage prevention in real time
● OilQSens® works from day 1, prior to other technologies limits of detection
● Continuous evaluation of aging of the insulation oil, identification of contamination and overload
Huge savings in:
● Money
● Downtime
● Man Hours
Identification of:
● Critical operation conditions
● Oil aging
● Deterioration in oil
● Oil contamination
Features:
● Robust communication unit (IP 68 standard)
● Patented temperature compensation
● Continuous online monitoring 24/7 to CMS server
● Easy to retrofit into existing high voltage transformers, oil regeneration systems ans aluminum rolling mills
● Industrial standard interfaces (RS232, LAN, Profibus, ...)
Applications:
● High voltage transformer monitoring
● Oil regeneration process control
● Contamination detection
● Oil deterioration monitoring
● Oil Condition monitoring solution
OilQSens® can detect early changes in oil quality/condition from day 1 - before damage occurs. Contamination products, such as particles, cellulose fibres, moisture and their contaminating effects, such as acid and oil soaps cause a change in the electrical properties of oil. With the oil quality sensor, OilQSens®, dependent parameters are measured continuously and online. From the changes in the oil, the condition of the transformer oil is evaluated. Dissolved gas analysis (DGA) is a sampling technique that may miss intermittent problems.
OilQSens® works online, continuously from day 1, prior to other technologies limits of detection. Conductivity, permittivity and temperature are measured with high precision. Both conductivity and permittivity are temperature dependent. OilQSens® features a self-adapting temperature compensation algorithm similar to a neural network. Electrical conductivity of oil is extremely low. However, the highly sensitive OilQSens® measures conductivity down to 0.1 picosiemens per metre and all values are accurately temperature compensated. Relative permittivity is a measure of the dielectric constant.
The measurement of permittivity by OilQSens® makes a statement about water ingress and a modification of the insulating strength of the oil. Taken in conjunction with the conductivity values, a clear picture emerges of the changes in the oil. The monitoring of oil in transformer, high voltage circuit breakers and oil regeneration plants is an important parameter for the efficiency and safety. As oil ages it forms charge carriers which alter the conductivity. The process is accelerated by the presence of metal catalysts, oxygen and temperature. The loss angle tan δ is calculated from the conductivity and permittivity. The measurement according to IEC61620 is based on alternating square-wave voltage with low voltage and frequency The web based, decentralised monitoring system is perfect for remote or inaccessible locations. Measurements are transmitted via LAN, WLAN or the serial interface.
Specification
Ranges
Conductivity: 0.1 to 20,000 pS/m (other on request)
Relative permittivity: 1 to 5
Sensitivity
Conductivity: 0.01 pS/m
Relative permittivity: 1*10-6
Temperature and pressure
Max oil pressure: 60 barg at 20o C (870 psig at 68o F)
Oil temperature: -10o C to +70o C (optional, high temperature: -10° to + 150°C) (optional, low temperature: -40° to + 65°C)
Operating temperature: -20o C to +70o C
Material:
Sensor material: Stainless steel (bowl, carrier and head)
Cable: 3 metre, shielded (optional, different cable length)
Connections:
¼” Swagelok® for 6mm o.d. tube (optional connectors available)
Communication Interface:
Serial communication via RS232/RS232-USB (opt.: LAN, GSM, Profibus, Modbus, CAN, 0..10V, 0/4..20mA)
Electrical requirements:
115/230 VAC, 50/60 Hz (optional, +24 VDC)
Weights and Dimensions
Dimensions (mm):
Sensor: 103 (height) x 70 (diameter)
Communication unit: 210 x 250 x 165
Communication module: 87 x 110 x 30
Weights net:
Sensor: 2.35 kg
Communication unit: 4.45 kg
Communication module: 0.25 kg
Part Number |
Description |
OilQSens® OQ3000 |
Consist of base sensor and communication unit with communication module, standard sensor cable length of 3 meter, serial communication via RS232 / RS232 to USB interface, 115/230 VAC, 50/60 Hz power supply |
Options |
|
-HT |
High Temperature Range (-10°C to + 150°C) |
-LT |
Low Temperature Range (-40°C to +65°C) |
-LAN |
LAN Interface, enables data transfer via TCP/IP |
-GSM |
GSM Interface, enables mobile data transfer via 3G phone network (SIM card has to be provided by the customer, requires LAN interface) |
-PROFIBUS |
PROFIBUS Interface (replaces standard RS232 interface) |
-MODBUS |
MODBUS Interface (replaces standard RS232 interface) |
-CAN |
CANBUS Interface (replaces standard RS232 interface) |
-AO_XY |
Analog Output: 0.10V or 0/4.20mA (X = numbers of channels to be transmitted, Y = V for voltage output or A for current output) |
-1Z |
1 inch connector block (replaces the standard sensor connector block) |
-24VDC |
+24 Volt DC power supply connector (replaces the standard power supply using the more compact communication module for easy installation into existing electrical cabinets) |
Acessories |
|
-PC |
PLA Protection cap for the base sensor during transport |
Service & Spares |
|
WS-OR-NBR |
O-ring for base sensor, optimized for Diesel applications |
WS-OR-FKM |
O-ring for base sensor, standard applications |
WS-FCC |
Factory Calibration Certificate |